If Nico had pushed him away, he'd have been okay with it. Even if he had to start all over again, Will would do it. He liked Nico and while, yeah, sometimes he wished for more, Will was comfortable with going at Nico's pace. Sure, they could die at any time considering things were always out to get them, but otherwise Will felt like he had all the time in the world for Nico.
He smiled even though no one could him. "I love you too." He wasn't sure if he could stay in the room forever, but he didn't feel like moving anytime soon. He was serious about finding a way to help Nico sleep. Maybe a song or something to deter ghosts.